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有些平面样板的轮廓交点位置没有实体(见图1),不能直接测量。通常在工具显微镜上只能间接测量计算而得。间接测量时,各参数(与空间可交点有关的尺寸、角度等)相互影响,各参数测量的准确性也必然影响到空间尺寸的准确性。空间尺寸的测量还涉及到公差变换和平面尺寸链的计算,比较繁琐。如若将空间尺寸变成直接可测实体尺寸,把虚交点变成实交点,这样检测起来就方便多了。为了这一目的,我们研制了一种长
Some of the planar templates have no physical intersection point (see Figure 1) and can not be measured directly. Usually measured on the tool microscope only indirectly calculated. Indirect measurement, the parameters (and the intersection of space-related dimensions, angles, etc.) affect each other, the accuracy of measurement of each parameter will inevitably affect the accuracy of the spatial size. The measurement of the spatial dimension also involves the calculation of tolerance transformation and plane dimension chain, which is complicated. If the size of the space into a direct measurable entity size, the virtual intersection point into the intersection, so it is more convenient to detect. For this purpose, we developed a long